Machine for waxing and plaiting paper



June F. SCHWARTZ MACHINE FOR WAXING AND PLAITING PAPER Filed July 26, 1938 4 Sheets-Sheet l June 9, 1942. F. SCHWARTZ 2,285,617

MACHINE FOR WAXING AND PLAITING PAPER Filed July 26, 1938 4 Sheets-Sheet June 9, 1942. F. SCHWARTZ 2,285,617

MACHINE FOR WAXING AND PLAITING PAPER Filed July 26, 1938 4 Sheets-Sheet 3 4 Sheets-Sheet 4 June 9, 1942. F. SCHWARTZ MACHINE FOR WAXING AND PLAI'IING PAPER Filed July 26, 1938 Wi l/Ill!!! Patented June 9, 1942 MACHINE FOR WAXING AND PLAITING PAPER Fred Schwartz, Green Bay, Wis., assignor to Fort Howard Paper Company, Green Bay, Wis a corporation of Wisconsin Application July 26, 1938, Serial No. 221,418

8 Claims.

The invention relates to a process of waxing, drying, plaiting, gumming, and again drying paper in the preparation of material to be used, for instance, for the lining of barrels, et cetera.

It is an object of the invention to provide an apparatus for carrying out the process referred to.

It is a further object of the invention to provide plaiting apparatus which is an improvement upon the apparatus of my former Patent No. 2,094,415, dated September 28, 1937.

It is a further object of the invention to provide apparatus for carrying out the process of waxing paper, then plaiting the same while the paper is hot and the plaiting apparatus is also heated to avoid accumulation of wax thereon.

Further objects of the invention will appear from the following description when read in connection with the accompanying drawings showing an illustrative embodiment of the invention, and wherein:

Figure 1 is a diagrammatic side elevation partly in section showing the full apparatus;

Fig. 2 is a detail sectional view upon line 2-2 of Figure '7, broken away to shorten the figure;

Fig.3 is a plan view of a, plaiting bar;

Fig. 4 is a side elevation of the same; and

Figs. 5 and 6 are elevations from left and right ends respectively of the same bar;

Fig. 7 is a detail plan view of the plaiting portion of the apparatus;

Fig. 8 is a detail vertical section on line 8-8 of Figure 7, drawn to an enlarged scale;

Figs. 9 to 13' inclusive are detail transverse sections on the corresponding section lines of Figure 2; and

Figs. 14 to 16 inclusive. are detail transverse sections on the corresponding section lines of Figure 8.

As shown in Figure 1, paper preferably initially creped transversely thereof is supplied to the machine from a roll 20, passes over idler rolls l1, It, the latter provided with braking means l9 and a pair of waxing rollers 25, 22, the lower of which dips into a molten bath of wax 23, and then over an idler roll 24 and about successive heated drums 25, 28, and 2'1, over an idler roll 28 and to the plalting apparatus 28. The latter named apparatus is shown as enclosed in a housing 30, provided with ventilation openings 98, having covers 98. the interior ofthe housing heated as by means of circulation of hot air from the radiator 3|, the-circulation being caused by a fan 32.

heated to atemperature above the melting point of the wax, for the purpose of causing the wax to be further equalized through the body of the paper and to provide a more efilcient taking of the plaited form whil the wax is hot and the paper is limp, aswell as to prevent accumulation of wax on the paper contacting portions of the apparatus.

As shown the plaiting machine proper comprises a curved bar 36 having means 31 for adjusting the curvature thereof, which means and bar are carried by a supporting bar 38, arranged with adjusting means 39 for vertical adjustment. The paper is delivered to the bar 36 from a roller 40 mounted in bearings equipped with braking means 4!.

smaller grooved rolls 50, 5| are placed above and below both sets of bands near the rolls 48, 48. Pairs of smooth surfaced rolls 52, shown in Figu'res 1 and 2 are placed above and below both pairs of bands.

Also an idler grooved roll 53 is journaled in arms 54, pivoted above the shaft roll 48 and resting its weight on the upper bands 45 to preserve the latter taut, as illustrated in Figure 2.

A set of plaiting blocks 55 is shown as mounted on a cross frame member 56, Figure 8. The form of the blocks is illustrated in Figures 3 to 6 inclusive. As there shown each block is arcuate in end elevation at the entering end 57 and fiattened at the leaving end 58. The upper surface of each block is formed with a plane surface beginning at a narrow portion 59 at the end 51 of the block and widening to substantially the full width of the block at at the leaving end 58 of the block, producing a wedge shape for the upper portion of the block above the neck 6| thereof.

The upper bands 45 where they extend beyond the roller 48 to pass about the roller 41 are thus in lapping relation with the plaiting blocks as illustrated in Figure 13 and-thus assist in the movement of the paper along the first portion of the plaiting blocks.

The paper during the plaiting operation is To further assist in the movement of the paper along the blocks, there is shown a roll 62 formed as shown in Figure 14 with circular helical bands 63 secured in grooves in its periphery, which roll is driven as will be explained and assists in passing the paper to the press rolls 64, 65, the latter roll having superposed thereon a roll 66.

' The roll fl journalled in blocks 61, slides in frame 33 and the floating rolls 65 and 66 thus 12 upon the side opposite to that to which the adhesive is applied and the adhesive being applied only upon the surface of alternate plaits as indicated in Figure 16.

The apparatus is driven by means of a chain 14 from a motor, not shown, passing about a sprocket on the shaft of roll 64. The shaft is extended and carries conical pulleys l5, 16 from which drum 16 the belt I! extends to drive the drying drum 12, the connection not being shown;

From the drum 15 a belt 18 passes about a third cone pulley 18 mounted on the shaft 8!) of roll 43, which shaft also bears a sprocket about which a chain 8| passes and in turn encircles a sprocket upon shaft 82 of roll 49, which latter bears a second sprocket encircled by a chain 83 passing about a sprocket on shaft 84 of roll 46.

Shaft 84 has a gear 85 in mesh with a gear 36 upon the shaft of roll 41. It will thus be seen that the rolls 43, 49, 46 and 41 will be driven at the same speed, which speedis adjustable with relation to the main drive by slipping the belt 18 to different locations upon the pulleys 15, 19.

The shaft of roll 64 carries a drive for roll 62 of such a nature that the speed of roll 62 may be independently modified with relation to the speed of the main drive, as indicated in Figures 7 and 8.

The sheave on the shaft of roll 64 and the sheave on stud 81 are formed to receive a V- belt 88 and the said sheaves are made up of separable parts in a well known manner so that the speed of driven sheave 34 may be varied. Said sheave 34 carries a gear 89 in mesh with a gear 90 carried by the shaft of roll 62. The shaft of roll 62 is mounted in arms 9| adjustable vertically and horizontally by the means indicated at 92, Figure 8, so that it may be adjusted vertically for pinch of the paper and horizontally for clearance from roll 65. The roll 65 is mounted in arms 93 pivotally mounted upon a shaft 94 horizontally adjustable by screws 95, as shown in Figure 8, whereby the roll 65 may be adjusted horizontally to and from the ends of blocks 55.

The form of paper as it enters between rolls 42, 43 is indicated in Figure 9 and from this position the bands 45 interlap and the interlap continually increases in amount to the position of rolls 46, 48, shown in Figure 12, and at intermediate points at section lines l0lll and l l-l I, Figure 2, as shown in Figures 10 and 11 respectively.

When the paper reaches the roll 41 it is in the condition shown in Figure 13 with the upwardly delivered portion of the loops of paper flattened out-upon the upper flattened surfaces of the blocks 55. When the paper reaches the roll 62, it has assumed the position shown in Figure 14 shortly after which it leaves the plaiting blocks and is pressed by the rolls 64 and '65 to the form shown in Figure 15 which is the final form of the plaited paper.

The rolls 45, 48 and the press roll 64 have provision for heating the same as by introduction of steam thereinto as :by pipes 96, 91 shown in Figure '1. This heating in combination with the heating of the atmosphere within the shroud 30 ensures that the wax which is applied to the paper will very thoroughly penetrate the fibers thereof.

Minor changes may be made in the physical embodiment of the invention within the scope of the appended claims without departing from the spirit thereof.

Iclaim:

1. Apparatus of the class described comprising, in combination: upper and lower sets of helical bands acting to deform a sheet into oppositely facing convolutions with gradual narrowing of the sheet; pairs of upper and lower grooved rolls about which said bands travel; a plurality of plaiting blocks receiving the sheet from said bands; a pair of press rolls receiving from said blocks to compress the plaits; power means to apply driving force to the apparatus through one of said press rolls; and adjustablespeed means to drive said first jnam'ed rolls from the shaft of said driven press roll whereby to control the feed to said press roll. I

2. Apparatus of the class described, comprising, in combination: upper and lower sets"- of a helical bands; the bands of each set converging in the direction of travel of a paper sheet therebetween and the bands of the .sets approaching a common plane in the same direction; a set of plaiting blocks receiving the sheet from said bands; lower grooved rollers about which the lower set of bands travel; the forward of said rolls located adjacent the receiving ends of said blocks and the respective blocks substantially in alignment with the bands of the lower set; upper grooved rolls about which the upper set of bands travel; the forward of the last named rolls placed midway of and above said blocks with the bands thereon interpolated with said blocks, to assist travel of the sheet along said blocks; a roll adjacent the forward end of said blocks'having ribs in substantial alignment with the respective bands of the upper set; and means to drive said rolls.

3. The combination of claim 2 with a pair of press rolls to receive the sheet from the blocks and compress the plaits.

4. The combination of claim 2 with a pair of press rolls to receive the sheet from the blocks and compress the plaits; means to drive the shaft of one of said press rolls; adjustable-speed means to drive said band rolls from said shaft; and independent adjustable-speed means to drive said ribbed r011 from said shaft.

5. Apparatus of the class described comprising,

in combination: upper and lower sets of forwardly converging helical bands to form a sheet of paper into convolutions; a set of plait blocks receiving said sheet from said bands; a ribbed roll, the ribs thereof interpolated between the blocks of said set; and means to adjust said roll both longitudinally of said blocks and for amount of interlap therewith.

6. The combination of claim 5 with a lower press roll mounted on a fixed axis; a floatingpress roll urged by gravity toward said lower roll; and

means to adjust the axis of said floating roll toward and from said ribbed roll.

7. The combination of claim 5 with a relatively large lower press roll mounted on a fixed axis; a

travel; said bands in each set in staggered relation to the bands in the other set and in spaced planes rearwardly, approaching a common plane forwardly; upper and lower grooved alignment preserving rolls between which the bands move; a floating roll resting its weight on the upper set of hands; a set of plaiting blocksforwardly of said forward grooved rolls; a pair of press rolls beyond said blocks; a ribbed roll coacting with said blocks; a main drive to the shaft of one of said press rolls; adjustable-speed drive means actuated by said shaft to drive the grooved rolls coacting with at, least one set 01' bands; separate adjustable-speed drive means actuated by said shaft to 1 drive said ribbed roll; and means to heat certain of said grooved rolls.

FRED SCHWARTZ. 

